The invite comes at a rather curious time, however, with current Chelsea boss Antonio Conte under increasing pressure amid rumours of a fallout.

Abramovich made a rare visit to the club’s training ground to talk with Conte last Sunday, while it has been reported that the Italian’s conduct over the summer erased any goodwill between him and Chelsea’s hierarchy.

Although Abramovich could just be looking to meet up with a manager who won him three Premier League titles in two separate spells, Mourinho has never painted their relationship in such a way.